A random sample of 400 residents are asked if they are in favor of theproposed 10% vanity tax that will raise badly needed revenue forinfrastructure development. If 300 are in favor, test the hypothesis thatmore than 60% of the voters are in favor of the proposed tax. Using a0.01 level of significance, what is the appropriate test statistic?Ot=6.12Ot=-6.12Oz=6.12OZ=-6.12

It is given that n=400 and x=300.

Answered: A random sample of 400 residents are…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A question in a poll taken in 2007 asked, "Do you think the penalties for underage drinking should be made more strict, less strict, or remain the same?" The sample proportion that responded "more strict" was 0.61 (61%). This result will be used to estimate the proportion of all adults in the United States who think that penalties for underage drinking should be more strict. The sample consisted of n = 500 randomly selected adults in the United States Calculate a 95% confidence interval that estimates the population proportion who think that penalties for underage drinking should be more strict. (Round your answers to three decimal places.)
In order to estimate the proportion of students at a small liberal arts college who watch reality TV for more than 4 hours per week, a random sample of students at the school is selected and each is interviewed about his or her reality TV viewing habits. The students conducting the survey are worried that people that watch reality TV might be embarrassed to admit it and that they may not respond to the survey with honest answers. What type of bias are the students conducting the survey worried about? Measurement or response bias They shouldn't worry--there is no obvious source of bias. Selection bias Nonresponse bias
The city council is considering a law that would ban smoking in all public parks. A sample has been selected from the community and tested for support of the ordinance. Age Support for Ban Less than 40 40+ Supports Ban 145 (58.5%) 78 (31.6%) 223 (45.1%) Against Ban 103 (41.5%) 169 (68.4%) 272 (54.9%) 248 (100%) 247 (100%) 495 (100%) a. How many degrees of freedom are there in this table? b. How many cells are in this table? c. Based on the column percents, what is the strength and direction of the relationship between age and support for anti-smoking laws? How did you determine these results?
A car wash is assessing the average wait time for its customers. The median wait time is 4 minutes. Does a customer who waits for 5 minutes represent an abnormal wait time? The customer who waits 5 minutes an abnormal case, because 50% of customers wait more than minutes.
A presidental candidate's aide estimates that, among all college students the propotion p who intend to vote in the upcoming election is at most 65%. If 186 out of a random sample of 260 college students expressed an intent to vote, can we reject the aid's estimate at 0.1 level significance? What is the type of statistic? what is the value of the test statistic? What is the p-value? Can we reject the aide's estimate that the proportion of college students who intend to vote is at most
An article published in the “American Journal of Public Health” describes the results of a health survey administered to 119 male convicts, 50 years of age or older, residing in a state social rehabilitation center. It was found that 21.6% of them claimed to have a history of venereal diseases. Based on these findings, we wish to evaluate whether more than 15% of this population has a history of venereal diseases. What would be the p value that allows evaluating the research question? A. 4.32 B. 2.09 C. -1.72 D. 0.018 E. 0.957
A software company is interested in improving customer satisfaction rate from the 65% currently claimed. The company sponsored a survey of 248 customers and found that 170 customers were satisfied. What is the test statistic z?
A company claims that less than 30% of people who both work and live in Newcastle. A study revealed that among a random sample of 200 people working in Newcastle, 62 also lived in Newcastle. Does the sample support the company’s claim? Use a level of significance of 0.01.
Last year, 41% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 32% planned to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 55 business owners. Suppose the business owners in the sample do as they plan. Conduct a hypothesis test that can be used to determine whether the proportion of business owners providing holiday gifts had decreased from last year. State the hypotheses.

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